Instruction manual

3 - 10
3. SIGNALS AND WIRING
3.3 Explanation of Power Supply System
3.3.1 Signal explanations
POINT
For the layout of connector and terminal block, refer to outline drawings in
Chapter 10.
Abbreviation
Connection Target
(Application)
Description
Supply the following power to L
1
, L
2
, L
3
. For the 1-phase 230VAC power supply,
connect the power supply to L
1
, L
2
, and keep L
3
open.
Servo amplifier
Power supply
MR-J3-
10A to
70A
MR-J3-
100A to
700A
MR-J3-
10A1 to
40A1
3-phase 200 to 230VAC, 50/60Hz L
1
L
2
L
3
1-phase 230VAC, 50/60Hz L
1
L
2
1-phase 100 to 120VAC, 50/60Hz L
1
L
2
L
1
L
2
L
3
Main circuit power
supply
P
1
P
2
Power factor improving
DC reactor
When not using the power factor improving DC reactor, connect P
1
-P
2
. (Factory-wired.)
When using the power factor improving DC reactor, disconnect the wiring across P
1
-P
2
and connect the power factor improving DC reactor across P
1
-P
2
. (Refer to Section
12.10.)
P
C
D
Regenerative brake
option
1) MR-J3-350A or less
When using servo amplifier built-in regenerative brake resistor, connect between P-
D terminals. (Wired by default)
When using regenerative brake option, disconnect between P-D terminals and
connect regenerative brake option to P terminal and C terminal.
2) MR-J3-500A or 700A
MR-J3-500A and 700A do not have D terminal.
When using servo amplifier built-in regenerative brake resistor, connect P terminal
and C terminal. (Wired by default)
When using regenerative brake option, disconnect P terminal and C terminal and
connect regenerative brake option to P terminal and C terminal. (Refer to Section
12.2)
Servo amplifier
Power supply
MR-J3-10A to
700A
MR-J3-10A1 to
40A1
1-phase 200 to 230VAC, 50/60Hz L
11
L
21
1-phase 100 to 120VAC, 50/60Hz L
11
L
21
L
11
L
21
Control circuit power
supply
U
V
W
Servo motor power Connect to the servo motor power supply terminals (U, V, W).
N
Return converter
Brake unit
When using return converter/brake unit, connect to P terminal and N terminal.
Do not connect to servo amplifier MR-J3-350A or less.
For details, refer to Section 12.3, 12.4.
Protective earth (PE)
Connect to the earth terminal of the servo motor and to the protective earth (PE) of the
control box to perform grounding.